APC UPS control system manual Con, USB Dynamic Minors

where you replace the [ and ] with braces and the serial number with the one that correspnds to your UPS.

Some

kernels

ship,

such as Mandrake

10,

ship

with

CON-

FIG

USB

DYNAMIC

MINORS

turned on.

This is not ideal

for

running

with

apcupsd,

and

the

easiest

solution

is to turn CON-

FIG

USB

DYNAMIC

MINORS

off

and

rebuild

your

kernel,

or

find a

pre-built kernel with

it

off.

For a

kernel

with

CON-

FIG

USB

DYNAMIC

MINORS

turned on to

work

with

apcupsd,

you

must enable devfs. The following will tell you if devfs is enabled:

$ ps ax grep devs

which should give something like the following:

533 ? S 0:00 devfsd /dev

What complicates the situation much more on Mandrake kernels is their security level since CONFIG DYNAMIC USB MINORS is turned on, but on higher security levels devfs is turned off. The net result, is that in those situations hiddev is hosed (to use Adam’s terms) so apcupsd will not work. So, in these cases, the choices are:

(a)Reduce the security level setting of the system

(not sure if this is possible after the initial install).

(b)Custom build a high security kernel with devfs enabled and make sure devfs is mounted and devfsd is running.

(c)Custom build a high security kernel with dynamic minors disabled

(d)Use udev

For a typical USB section of a kernel .config file, please see the end of this section.

For the IOGear serial USB connection, you need:

usbcore usbserial pl2303

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